ISSN:
1434-6036
Keywords:
PACS. 74.50.+r Proximity effects, weak links, tunneling phenomena, and Josephson effects – 74.72.Bk Y-based cuprates – 74.76.Bz High-Tc films
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: We have applied the break-junction technique to highly biepitaxial c-axis oriented YBa2Cu3O7 thin films with T C (ρ=0) = 91 K. Mechanically adjustable junctions with a good stability and tunneling current favored along the ab-planes have been realized. The conductance characteristics of these junctions show the presence of gap related maxima that move towards zero bias for increasing temperatures. Considering the misorientation angle α≈ 45 ° ± 5 ° of the junction, a maximum gap value at the Fermi level Δ ≈ 22 meV is inferred at T = 13 K. The temperature dependence of the gap related structures, shows a quasilinear behavior for T 〉 0.4 T C similar to that observed in c-axis oriented, S-I-N type YBa2Cu3O7 planar junctions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s10051-001-8678-1
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